import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.*;
import org.apache.shiro.config.IniSecurityManagerFactory;
import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.session.Session;
import org.apache.shiro.subject.Subject;
import org.apache.shiro.util.Factory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
 * @Author zsr
 * @Desc
 * @Date 2021/5/24 23:53
 */
public class Quickstart {

        private static final transient Logger log = LoggerFactory.getLogger(Quickstart.class);


        public static void main(String[] args) {

            // The easiest way to create a Shiro SecurityManager with configured
            // realms, users, roles and permissions is to use the simple INI config.
            // We'll do that by using a factory that can ingest a .ini file and
            // return a SecurityManager instance:

            // Use the shiro.ini file at the root of the classpath
            // (file: and url: prefixes load from files and urls respectively):
            Factory<SecurityManager> factory = new IniSecurityManagerFactory("classpath:shiro.ini");
            SecurityManager securityManager = factory.getInstance();

            // for this simple example quickstart, make the SecurityManager
            // accessible as a JVM singleton.  Most applications wouldn't do this
            // and instead rely on their container configuration or web.xml for
            // webapps.  That is outside the scope of this simple quickstart, so
            // we'll just do the bare minimum so you can continue to get a feel
            // for things.
            SecurityUtils.setSecurityManager(securityManager);

            // Now that a simple Shiro environment is set up, let's see what you can do:

            // get the currently executing user:
            Subject currentUser = SecurityUtils.getSubject();

            // Do some stuff with a Session (no need for a web or EJB container!!!)
            Session session = currentUser.getSession();
            session.setAttribute("someKey", "aValue");
            String value = (String) session.getAttribute("someKey");
            if (value.equals("aValue")) {
                log.info("Retrieved the correct value! [" + value + "]");
            }

            // let's login the current user so we can check against roles and permissions:
            if (!currentUser.isAuthenticated()) {
                UsernamePasswordToken token = new UsernamePasswordToken("lonestarr", "vespa");
                token.setRememberMe(true);
                try {
                    currentUser.login(token);
                } catch (UnknownAccountException uae) {
                    log.info("There is no user with username of " + token.getPrincipal());
                } catch (IncorrectCredentialsException ice) {
                    log.info("Password for account " + token.getPrincipal() + " was incorrect!");
                } catch (LockedAccountException lae) {
                    log.info("The account for username " + token.getPrincipal() + " is locked.  " +
                            "Please contact your administrator to unlock it.");
                }
                // ... catch more exceptions here (maybe custom ones specific to your application?
                catch (AuthenticationException ae) {
                    //unexpected condition?  error?
                }
            }

            //say who they are:
            //print their identifying principal (in this case, a username):
            log.info("User [" + currentUser.getPrincipal() + "] logged in successfully.");

            //test a role:
            if (currentUser.hasRole("schwartz")) {
                log.info("May the Schwartz be with you!");
            } else {
                log.info("Hello, mere mortal.");
            }

            //test a typed permission (not instance-level)
            if (currentUser.isPermitted("lightsaber:wield")) {
                log.info("You may use a lightsaber ring.  Use it wisely.");
            } else {
                log.info("Sorry, lightsaber rings are for schwartz masters only.");
            }

            //a (very powerful) Instance Level permission:
            if (currentUser.isPermitted("winnebago:drive:eagle5")) {
                log.info("You are permitted to 'drive' the winnebago with license plate (id) 'eagle5'.  " +
                        "Here are the keys - have fun!");
            } else {
                log.info("Sorry, you aren't allowed to drive the 'eagle5' winnebago!");
            }

            //all done - log out!
            currentUser.logout();

            System.exit(0);
    }
}
